Statistical analysis
Study data are retained in a Northwell Health RedCap database.
Statistical analysis was carried out using SAS version 9.4 software
(Cary, NC). Continuous variables were reported as medians and
interquartile ranges. Categorical variables were reported as frequencies
and percentages. Wilcoxon rank sum tests were used to test differences
in the distribution of continuous variables. Chi-square test and Fisher
exact test were used for the comparison of proportions of categorical
variables. Wilcoxon rank sum tests were used to test the differences in
PES and FiO2. Significant weaning of respiratory support was examined as
a dichotomous variable and Chi-square test was used to test differences
between the study and control groups. P -values of <0.05
were considered statistically significant. We used two coefficients for
the analysis of both interrater and intrarater agreement: Gwet’s AC2 and
Brennan-Prediger’s Kappa.